I originally booked for one month and repeatedly extended for a total stay of 5 months! I feel like that should say enough :)
Suksun is great! Super fast communication and the flat is spacious, bright, lovely views, and just great. Note there's no dryer (nor are there any in the building), but actually I have never had a dryer in Bangkok. The condo is in a quiet area, and is about 5-7 mins walk to the Thong Lo BTS platform. I walked it twice a day minimum without any complaint at all (Soi 51 is a quiet street that's pleasant to walk on). Though if you don't like walking in the heat or are in a rush, there are moto taxis constantly coming down Soi 51, right at the corner outside the flat.
Super markets are right around the corner, and there are now several restaurants, bars, and coffee shops on Soi 51 (a new one right next door to the condo actually). But if you want to make it over to places on the main road in Thonglor, you'll probably want to take a moto taxi.